PETRELS. 177 



(P. Z. S. 1832, p. 128) *, or belong to a species not yet 

 recognized as British. 1 have seen two or three spe- 

 cimens of a Shearwater taken on different parts of the 

 English coast, intermediate in size between P. major 

 and anglorum^ ; and I have little doubt that a careful 

 examination of these would result in the establish- 

 ment of a fourth species of Puffinus in the British list. 



Not having had the opportunity of examining the 

 specimens above noticed, I consider their species for 

 the present undetermined, with the exception of the 

 first on the list, but refer to the records of their 

 capture, for convenience, under the head of the species 

 to which they have been thought to belong. 



Those who may investigate this question will derive 

 considerable assistance from a perusal of Dr. Elliott 

 Coues's " Critical Review of the Family Procellaridce" 

 published in the 'Proc. Acad. Nat. Sci. Philad.' 1864, 

 pp. 72 & 116, and 1866, pp. 25 & 134; and of 

 Professor Newton's remarks on the subject in the 

 Zoologist ' for 1852, pp. 3691-3698. 



CAPPED PETEEL. (Estrelata hcesitata (Kuhl)$. 



Hob. Atlantic coast, from Florida to New York, and the 

 West Indies. 



* This specimen was killed at Bridlington in Yorkshire. 



t The species recorded by Yarrell as the Cinereous Shearwater, 

 it will be recollected, is considerably smaller than anylorum. 



J In determining the generic relationship of this bird I have 

 followed the nomenclature adopted by Dr. Elliott Coues in his 

 excellent monograph above mentioned (cf. Proc. Acad. Nat. Sc. 

 Philad. 1866, p. 139). 



